After today's major decline, I also want to comment on other aspects of this post's analysis.
1. This post noted that "Bollinger Bands on the 2-hour chart show increasing directional volatility. And the Bollinger Bands correctly predicted increasing directional volatility. Partial success here.
2. The forecast of a continued bear rally / chop with an upward bias into this week was proven incorrect though it was partially correct—on Monday, SPX continued the upward move by about 1.06%. But Tuesday was a massive down move though. Continuation to the downside remains the path of least resistance.
3. One of the more conservative targets were reached: 4106. The next target of 4130, 4137 and 4149 and 4187 and the gap fill areas at 4219 and 4279 were not reached, and are likely invalid targets in the short-term. It's not prudent to bet against this strong downward move (for now) for anything other than an intraday bounce.
4. The post noted Bollinger Bands on the daily chart have begun to narrow, showing that the trending downward move is temporarily paused while price chops within the recent range. This appears less likely after today's impulsive downward move—if price reverses tomorrow for some reason, then maybe (small chance) the chop continues. But with a -4.3% drop in SPX and over -5% in NDX, price is likely signaling a near-term trend move down.